Journal of cardiovascular electrophysiology
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J. Cardiovasc. Electrophysiol. · Feb 2005
Case ReportsMultiple pacing lead-induced superior vena cava syndrome: successful treatment by balloon angioplasty.
Pacemaker-induced SVC syndrome. The superior vena cava (SVC) syndrome is an uncommon but sometimes serious complication associated with permanently implanted pacemakers. The mechanical stress associated with pacemaker wires may lead to vessel wall inflammation, fibrosis, thrombus formation, and, ultimately, venous stenosis and occlusion. ⋯ The long-term effects on the pacemaker electrodes, due to compression between the stent and the wall of the vein, remain unknown. We describe a case in which balloon venoplasty successfully resolved the SVC syndrome. The patient has remained symptom-free and with normal pacemaker function for 6 months.
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J. Cardiovasc. Electrophysiol. · Jan 2005
Randomized Controlled Trial Multicenter Study Clinical TrialTraditional and nonlinear heart rate variability are each independently associated with mortality after myocardial infarction.
Decreased heart rate variability (HRV) and abnormal nonlinear HRV shortly after myocardial infarction (MI) are risk factors for mortality. Traditional HRV predicts mortality in patients with a range of times post-MI, but the association of nonlinear HRV and outcome in this population is unknown. ⋯ Nonlinear HRV is associated with mortality post-MI. However, as with traditional HRV, this is diluted by CABG surgery post-MI and by diabetes. Results suggest that decreased long-term HRV and increased randomness of heart rate are each independent risk factors for mortality post-MI.
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J. Cardiovasc. Electrophysiol. · Dec 2004
Preoperative electrocardiographic risk assessment of atrial fibrillation after coronary artery bypass grafting.
This study evaluated the role of surface ECG in assessment of risk of new-onset atrial fibrillation (AF) after coronary artery bypass grafting surgery (CABG). ⋯ ECG assessment identifies patients vulnerable to AF after CABG. Combination of ECG parameters assessed preoperatively may play an important role in predicting new-onset AF after CABG.
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J. Cardiovasc. Electrophysiol. · Nov 2004
Case ReportsManifestation of Brugada syndrome after pacemaker implantation in a patient with sick sinus syndrome.
A 49-year-old woman experienced syncope 10 months after DDD pacemaker implantation for sick sinus syndrome. ECG revealed abnormal ST elevation in leads V1 to V3 during a paced rhythm. ⋯ The diagnosis of Brugada syndrome was made, and the DDD pacemaker was upgraded to an implantable cardioverter defibrillator. Brugada syndrome can be easily overlooked if the classic ECG findings are not initially noted but may be observed even during pacing therapy.